.drag-selected {
  background-color: rgba(24, 144, 255, 0.2) !important;
}

.drag-selected:hover > td {
  background: none !important;
}

/* 给表头单元格加 z-index */
.ant-table-thead > tr > th {
  position: relative;   /* 必须有定位 */
  z-index: 49;
  background: #fafafa;  /* 避免透明 */
}

